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-5
votes
4answers
2k views

Find Missing numbers in the picture [closed]

Let see who can crack this. Find the missing numbers in the image. Explain the logic. Challenge for all masterminds
7
votes
5answers
2k views

Cut up a cheese cube into $6$ equal parts with $5$ slices

Bob has a cheese cube and wants to cut it up into exactly $6$ equal pieces for his guests. These guests are professional cheese connoisseurs who will complain if they get less than anyone else. Bob ...
15
votes
4answers
489 views

A Perfectly Primitive Parameter Permuter

A simple challenge for the mathematically inclined. Find a function $f\left( {{x_1},{x_2},{x_3},{x_4}} \right)$ such that $$\begin{gathered} f\left( {2,3,4,5} \right) = 1 \hfill \\ f\left( {1,3,4,...
10
votes
22answers
3k views

When you are sick you might have me, with a hand full of letters [closed]

I apologize in advance for the lack of rhymes (as it seems quite difficult here). I have instead added a lot of 'depth' to this riddle (which should be easily unwound once solved) - Hopefully it isn't ...
0
votes
7answers
8k views

Weighing an elephant [closed]

Here's another classic I couldn't find on the site: How can you determine the weight of an elephant without using a scale?
16
votes
6answers
2k views

Chocolate challenge

Jack has \$1000 and plans to buy chocolates for all that money. He finds out that his favourite chocolate sells for \$1, but there is a special offer: for every four wrappers he gives to the ...
4
votes
1answer
1k views

A riddle of many elements

First a sport some love, Though it drinks their blood. Named for just a seat, Though power is the key. Then the sound of metal, Slamming together in war. That of which there are five, Vying in the ...
34
votes
1answer
3k views

Name the 25 Ants

When solving the Contagious Ants on a Meterstick problem, puzzlers often overlook the fact that ants are sophisticated creatures with names, dreams, and personalities. ...
17
votes
1answer
1k views

Contagious ants on a stick

Twenty-five ants are scattered on a meter stick. At the same time, they each pick a random direction (east or west) and start marching at 1cm/second. Whenever two ants meet, they turn around. When an ...
23
votes
1answer
2k views

Identify the twins and cousins!

Let me tell you about four friends of mine. They're a close-knit bunch: two pairs of twins who are cousins to each other. The first guy is Adam. He's a devout Christian, going to church every week. ...
4
votes
1answer
675 views

I give you some metal, and you steal my name!

It was hard to expand on this riddle while maintaining the single rhymes, so it is much easier than expected to solve...Hopefully you enjoy the rhymes: I give you some metal, and you steal my name! ...
4
votes
5answers
1k views

The Twenty Doors! (ROOM 3)

This is part of The Twenty Doors series. The previous one is The Twenty Doors! (ROOM 2) The next one is The Twenty Doors (ROOM 4) When you finally realise that the cipher used in room 2 was the ...
43
votes
5answers
3k views

How do I force-quit the program?

My friend has been playing with a program he found. He enters a 5-digit number into the command line and receives another 5-digit number in return. However, after 20 or so entries, he's about done and ...
12
votes
3answers
657 views

Rearranging connected tiles

Sorry. The previously posted image contained a mistake. Tile D2 was shown with a 180 degree rotation. The image has now been corrected. This is a straight-forward arrangement puzzle. You are ...
8
votes
1answer
972 views

Here's precisely what I am not. Who am I?

At first I’m quite fun to be around, until I make some wrongful sound. Maybe it offends, maybe it’s rude but I conceal my true attitude. Reverse me and you’ve something new be it a weapon, or a ...
-3
votes
1answer
624 views

Circular arrangement Puzzle

I was given this puzzle: Eight friends (Romil, Ramesh, Rakesh, Rohit, Rahul, Abhijeet, Abhishek and Anil) are sitting around a circular table, but not necessarily in the same order. Four of them ...
8
votes
1answer
751 views

Pretzel recipe with a twist

Browsing the geometry section in the local library you come across a flimsy book, seemingly misplaced: "The Pretzel Cookbook: Five More Patterns Using The Spoke Method" What's more, it's been ...
0
votes
3answers
10k views

A Water Jug Problem [duplicate]

Suppose you are given two jugs: a 4-gallon one and 3-gallon one, and neither has any markings on it. You have a pump that can be used to fill the jugs with water. What do you do so that exactly 2 ...
13
votes
4answers
551 views

Who's my friend?

I've got a friend who's a real great guy! He loves a drink. He'll help you change your car tyres. This one time, he met an alien and got a coat out of it. This other time, he got talking to a space ...
4
votes
2answers
1k views

How to check a partial sudoku solution

John has started a sudoku puzzle and shows me his completed work, asking whether he's made any errors. There are no obvious errors (a number repeated in a row or subgrid). I know of two ways to ...
5
votes
2answers
950 views

How to check a partial Einstein's-like-puzzle solution

John has started an Einstein's-like puzzle ("$n$ people of $n$ ages prefer $n$ foods, etc.; determine which is which from the following facts"), using a matrix for his work. He shows me his completed ...
4
votes
2answers
557 views

Reasoning behind next step in sudoku

As you can see in the image, I've been struggling with this sudoku for quite some time and I'm completely stuck. I'm sure I'm missing one standard trick which would make it easy to solve, but I can't ...
10
votes
1answer
914 views

Who stole my laptop?

It’s obvious that one of my “friends” was lying to me back in March this year. Someone who knew I’d be gone stole my $1,500 laptop and my crappy old broken microwave (I probably won’t ask for that one ...
26
votes
2answers
1k views

The Wonderful Wanderfull Puzz

In the land of Puzz, all the days are strange The sounds repeat, but with one wee change A troll trail hither and a dwarf wharf yon A wee hairy fairy or a fat fun faun Won't you come walking through ...
12
votes
6answers
2k views

Treasure hunt 'round the world! (Interlude 1)

If you're interested in starting the treasure hunt from the very beginning, check out the prologue! Upon your arrival at Parc Natural de la Vall de Sorteny, you're greeted by a group of ...
8
votes
3answers
759 views

Where will they strike?

You are part of an international anti-terror unit who has intelligence that some religious fanatics of the FSM church are going to soon blow a bomb in one or more of the world's major cities. You're ...
5
votes
1answer
163 views

Common Linkception

Each of the following list of words have a common link. Each of those common links are they themselves another group with a common link. Can you find each common link and the meta-common link? Age,...
2
votes
2answers
2k views

Is there any solution for this puzzle? [duplicate]

There is a house with 5 room and one door with every single wall as shown in following figure. You have to visit every door exactly once but there is a condition that you cannot cross the path. I ...
-4
votes
1answer
198 views

What is the encryption algorithm used here? [closed]

Can you decipher what encryption algorithm has been used here. I have several examples but I cannot decipher the algorithm used. ...
36
votes
11answers
21k views

Connect 3 houses with 3 wells

Connect every house with every well without the lines intersecting. I am not sure if this puzzle has a solution. I have been puzzled by it for a long long time. An old man from my village mentioned ...
9
votes
2answers
2k views

What do these words have in common, and where?

What do the following have in common? India, black, $10^{-6}$, many, south (More or less the same process can be applied to all of them to get very similar and related results.)
2
votes
2answers
484 views

What is my friend trying to tell me?

My friend sent me the following short message: D57919749C3641B796384D0795DDE33739ED3E03 How should I decode it? Hint: Hint2: Hint 3:
17
votes
5answers
5k views

Find the link between these everyday words?

You have to simply step forward and find the common link between these words: age, date, drill, go, hole The correct link works in the exact same way for each of the words.
34
votes
1answer
707 views

Perplexing Fireworks

In the Perfectly Pixelated Puzzling Plaza, some people were setting off fireworks. Being the puzzling fellows that they are, they couldn't bear to just set off fireworks for the sheer enjoyment of it (...
24
votes
5answers
8k views

The Riddle of Life, to Ease all Your Strife

-- Side Story: Please skip ahead if you want the riddle -- Intro: Everyone knows of The Oracle: After months of dodging dragons and trolls and sneaky gods and the wrath of the entire world, you are ...
16
votes
3answers
2k views

The Pie-Maker's Son

Preface: There's a lot of background story here. Most of it is just for fun but there are definitely clues sprinkled throughout. If you want the strict puzzle, skip on down to the bottom. For many ...
4
votes
2answers
941 views

What do these circles have in common - and what not?

The image below shows 7 x 7 grey circles which all but one share a common attribute. Can you see this shared property, or rather: Can you see which circles does not belong to the group and give a ...
11
votes
1answer
1k views

What movie title does this represent?

Here's a rebus that involves no math skill, and is designed to be simple. What movie title is represented below?
13
votes
4answers
2k views

The Twenty Doors! (ROOM 2)

This is part of The Twenty Doors series. The previous one is The Twenty Doors! (ROOM 1) The next one is The Twenty Doors! (ROOM 3) ROOM 2: After entering the first door, you find yourself in a ...
6
votes
2answers
607 views

Two lists of favorite words 2!

This is inspired from Luke's Two lists of favorite words. My aunt Sally keeps this list of her favorite words tacked on the refrigerator: Angel Art Atlas Bad Detail Hall Hand Mutter Rat Tiger ...
6
votes
3answers
617 views

What does this say?

A geek friend of mine said that this was what he was listening to and I'm apparently supposed to figure it out: ...
50
votes
11answers
10k views

Turning a goat?

This is a goat made up of 5 sticks. You have to move (change position) any one stick of them such that its head turns to the right side (above the right leg). Notice currently its head is on the left ...
24
votes
3answers
5k views

The Twenty Doors! (ROOM 1)

This is part of The Twenty Doors series. The next one is The Twenty Doors! (ROOM 2) You stand in a small, dark room. You have no idea where you are. Then, you see a message in front of you. ...
12
votes
2answers
780 views

Treasure hunt 'round the world! (clue 2)

If you're interested in starting the treasure hunt from the very beginning, check out the prologue! Upon arrival at the Pamplona Airport, you head towards baggage claim. Standing at baggage claim, ...
22
votes
7answers
3k views

How much water do you need to cross the desert?

This question is inspired by Terry Pratchett's "Small Gods," in which an army crosses a vast desert by making multiple trips and caching water along the way. 1. Provide an answer. 2. I doubt I'm the ...
12
votes
5answers
1k views

Still going strong - Who am I?

Search, searching, still searching am I, For those that on that one day did die. We don't even know the name of the place, I'm going there, even if you can't keep pace. In the world out there, ...
4
votes
1answer
952 views

What does Europe have in common with Timon and Pumbaa?

The answer is a five-letter English word, but "give me a hint" you might say. Unscramble the non-English text below, and you will be well on your way to solving this riddle. Just don't let ...
4
votes
3answers
390 views

Fill in the Dashes : Part 3 of 10 - Comic Superheroes Alter-egos

This is part of the Fill in the Dashes series of puzzles. Example: F_ in the B_ ⇒ Fill in the Blanks Some of the words will be Juxtaposed as in: B_ F_ in the ⇒ Fill in the Blanks e.g.: C_ K_ ...
33
votes
3answers
6k views

Draw 4 straight lines to create 10 equal squares in this image

You can draw up to 4 straight lines in order to create 10 equal squares in the following figure:
3
votes
2answers
572 views

Fill in the Dashes : Part 2 of 10

This is part of the Fill in the Dashes series of puzzles. Example: F_ in the B_   $\Rightarrow$  Fill in the Blanks Some of the words will be juxtaposed as in: B_ F_ in the  &...

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